CN208534469U - Electric heating assisted gravity oil drainage device - Google Patents
Electric heating assisted gravity oil drainage device Download PDFInfo
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- CN208534469U CN208534469U CN201821146620.6U CN201821146620U CN208534469U CN 208534469 U CN208534469 U CN 208534469U CN 201821146620 U CN201821146620 U CN 201821146620U CN 208534469 U CN208534469 U CN 208534469U
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- Prior art keywords
- coiled tubing
- well
- drainage device
- electric heating
- assisted gravity
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Abstract
The utility model relates to thickened oil recovery technical field of auxiliary equipment, it is a kind of electric heating assisted gravity oil drainage device, it includes coiled tubing, the through-hole pipeline section communicated with coiled tubing is provided in the coiled tubing right part that can protrude into horizontal production well horizontal segment, the through-hole communicated with the sieve pore of oil reservoir screen casing is distributed on through-hole pipeline section tube wall, at least one heating cable is provided in coiled tubing.The utility model reasonable and compact in structure, it is easy to use, it heats the fluid entered in coiled tubing by using heating cable, by fluid to stratigraphic oil pool transferring heat energy, since steam enters stratum by the through-hole on through-hole pipeline section, the position of through-hole can be heated according to horizontal segment oil reservoir to be needed to be arranged, therefore, its position for heating stratigraphic oil pool is not a point, but the one of horizontal segment section of region or multistage region, vapor chamber is set to develop into continuous steam chamber, employ oil reservoir more uniform, more mining level producing well horizontal segment distal end oil reservoir.
Description
Technical field
The utility model relates to thickened oil recovery technical field of auxiliary equipment, are a kind of electric heating assisted gravity oil drainage devices.
Background technique
Steam assisted gravity drainage (SAGD, Steam Assisted Gravity Drainage) is a kind of effectively
Thickened oil recovery method is to reach to reduce viscosity of crude and increase fluid ability by the vaporization latent heat oil reservoir of injection steam,
The method for dominating draining by gravity.In gravity drainage recovery process, steam is produced from level near oil reservoir bottom is located at
The vertical steam injection well of a bite horizontal steam injection well or several mouths above well injects oil reservoir, the crude oil being heated and steam condensate from oil
The horizontal production well extraction of bottom is hidden, this method can increase substantially the yield and recovery ratio of viscous crude.
It is found in oil field practice application SAGD oil production method, due to being limited by formation physical property or DP technology, water
Oil reservoir above flat producing well is usually employed unevenly, and oil recovery efficiency and ultimate recovery are seriously affected.In part reservoir region
It is steamed due to being influenced by factors such as wellbore trace precision, Reservoir Heterogeneity, underground injection-production column jacket and artificial lifting way in domain
Vapour chamber developed in oil reservoir it is unbalanced, as shown in Figure 1, before common phenomenon is vapor chamber major developmental above the horizontal production well
Middle section (frequently referred to " heel " position), and the vapor chamber at (frequently referred to " tiptoe " position) is often developed not above rear in horizontal well
It is good, even wholly without development.According to theory analysis and oil field practical experience, the main reason for causing this vapour chamber to be distributed, there is two
It is a: (1) to be influenced by reservoir heterogeneity, the flow profile of crude oil to horizontal well is uneven, and result is exactly vapor chamber along water
The top development of flat section is uneven；(2) under normal conditions, oil extraction pump is located at " heel " near sites, due to SAGD producing well
Horizontal segment is longer (300 meters to 800 meters), when fluid is flowed from tiptoe to heel, can generate pressure drop in horizontal segment pit shaft, cause
Flowing pressure in horizontal segment pit shaft at heel is minimum, and flowing of the reservoir fluid into well also can be most, causes near heel
Vapor chamber Overgrowth.When serious, it is also easy to occur the breakthrough of steam single-point at heel, is formed between steam injection well and producing well
" short circuit " effect；And decline in the draining rate of horizontal segment distal end, the quantity of steam into oil reservoir is reduced, and vapor chamber further cannot be very
It develops well, or even stops extension and atrophy.Final result is exactly that oil reservoir is employed unevenly, and horizontal segment distal end oil reservoir cannot be effective
Ground exploitation, not only oil recovery amount is low, and water content increases, and the utilization efficiency of horizontal well horizontal segment reduces, and gas oil ratio is low.Once
There is single-point to break through, especially steam breakthrough nearby occurs for heel, and horizontal well producing level is greatly lowered, and regulation is very tired
It is difficult.Other technologies are attempted also in operation at the scene at present to adjust the development of vapour chamber, the steam thermal cycle including the later period
With the technologies such as draining tubing string lower in horizontal production well, but the improvement degree of effect and it is of limited application.It effectively solves horizontal
Section is employed two uneven big difficult points and is: if (1) in underground using steam heat circulating-heating, it is generally the case that steam needs to add
The entire horizontal segment of heat, and the heating at " heel " if circulating pressure is higher than formation pressure, it is excellent at most to also result in steam
It is introduced into best " heel " section of connecting degree, causes more serious channeling；(2) if descending draining tubing string in production pit shaft,
In horizontal segment tubing string and the pressure drop of annular space is lower, to achieve the purpose that change stream buckling section right and wrong by lower draining tubing string
It is often limited.
At present also about the disclosure of the device of assisted gravity drainage, for example application No. is 201320141945.6 China
Patent document discloses a kind of thick oil horizontal well coiled tubing cable electric heater unit, which will be electric by coiled tubing
Cable, heating rod tripping in thick oil underground well horizontal segment acquire the data real-time control underground temperature such as down-hole pressure, temperature by control cabinet
Degree directly carries out heat temperature raising to viscous crude using heating rod, reduces viscosity of thickened oil.Due to its directly utilize heating rod to viscous crude into
Row heating, injects without fluid, relies solely on to the thermally conductive of stratum, heat transfer efficiency is low.The heating method cannot be provided to stratum
Displacement of reservoir oil energy, oil recovery efficiency are low.
Summary of the invention
The utility model provides a kind of electric heating assisted gravity oil drainage device, overcomes the defects of the prior art,
It can effectively solve existing assisted gravity drainage device presence and is difficult to uniformly employ the oil on horizontal production well horizontal segment on a large scale
The problem of hiding.
The technical solution of the utility model is realized by following measures: a kind of electric heating assisted gravity oil drainage dress
It sets, including coiled tubing, is provided in the coiled tubing right part that can protrude into horizontal production well horizontal segment and is communicated with coiled tubing
Through-hole pipeline section is distributed with the through-hole communicated with the sieve pore of oil reservoir screen casing on through-hole pipeline section tube wall, is provided in coiled tubing
At least one heats cable.
Here is the further optimization and/or improvements to above-mentioned utility model technical solution:
The above-mentioned heating cable in the coiled tubing of horizontal production well horizontal segment is electrically connected with electric heater.
Above-mentioned electric heating assisted gravity oil drainage device further includes production casing, flow string and is fixed on horizontal production well water
The oil reservoir screen casing of flat section, production casing are sequentially connected to oil reservoir screen casing, and coiled tubing is arranged in the production of horizontal production well
In annular space between casing and flow string, and the right part of coiled tubing protrudes into oil reservoir screen casing.
Above-mentioned heating cable is arranged in the coiled tubing between horizontal production well well head and through-hole pipeline section.
Above-mentioned further includes the power supply unit on well, and heating cable is electrically connected with the power supply unit on well.
Above-mentioned further includes conveying equipment for fluid substances, and the upper end import of coiled tubing is fixedly connected with conveying equipment for fluid substances.
The utility model reasonable and compact in structure, it is easy to use, by using heating cable in entrance coiled tubing
Fluid heated, by fluid to stratigraphic oil pool transferring heat energy, since steam enters ground by the through-hole on through-hole pipeline section
Therefore layer heats a position not instead of point for stratigraphic oil pool, one section of region of horizontal segment or multistage region, makes to steam
Vapour chamber can develop into continuous steam chamber, employ oil reservoir more uniform, more mining level producing well horizontal segment distal end
Oil reservoir.
Detailed description of the invention
Attached drawing 1 is the schematic view of the front view that thickened oil recovery is carried out using the Technology of Heavy Oil Recovery of existing gravity drainage.
Attached drawing 2 is the schematic view of the front view that thickened oil recovery is carried out using the best embodiment of the utility model.
Coding in attached drawing is respectively as follows: 1 for horizontal production well, and 2 be coiled tubing, and 3 be through-hole pipeline section, and 4 be oil reservoir screen casing,
5 is heat cable, and 6 be horizontal production well heel, and 7 be liquid-vaqor interface, and 8 be surface pipe, and 9 be production casing, and 10 make a living
Tubing string is produced, 11 be down-hole pumping unit, and 12 be horizontal production well horizontal segment tiptoe position, and 13 be vapor chamber, and 14 be continuous steam chamber,
15 be electric heater, and 16 be high-pressure hydraulic pump, and 17 be through-hole.
Specific embodiment
The utility model is not limited by following embodiments, can technical solution according to the present utility model and actual conditions
Determine specific embodiment.
In the present invention, for ease of description, the description of the relative positional relationship of each component is according to specification
The Butut mode of attached drawing 1 is described, such as: front, rear, top, and bottom, left and right positional relationship be according to Figure of description 1
Butut direction determine.In the present invention, unless otherwise instructed, equipment referred to etc. is in existing well-known technique
Conventional equipment etc..
The utility model is further described below with reference to examples and drawings:
As shown in Fig. 2, which includes coiled tubing 2, can protrude into horizontal production well 1
2 right part of coiled tubing of horizontal segment is provided with the through-hole pipeline section 3 communicated with coiled tubing 2, is distributed on 3 tube wall of through-hole pipeline section
The through-hole 17 communicated with the sieve pore of oil reservoir screen casing 4 is provided at least one heating cable 5 in coiled tubing 2.
Oil jacket annulus is the annular space between production casing 9 and flow string 10 in the prior art.
When the utility model is used, according to existing known oil recovery technique into well tripping in surface pipe 8, production casing 9,
Flow string 10 and underground pumping unit (as shown in Fig. 1), heating 5 upper end of cable are electrically connected with power supply unit, pass through fluid
Conveying equipment (high-pressure hydraulic pump 16) injects high pressure water into horizontal production well 1 from the upper port of coiled tubing 2, by heating cable
The high pressure water of 5 pairs of injections heats, and high pressure water constantly heats up in horizontal production well 1, and high pressure water is in horizontal production well heel
Steam is flashed in coiled tubing 2 between position 6 and through-hole pipeline section 3, in the height of the subsequent high pressure water for being sent into horizontal production well 1
Under pressure power, steam continues distally to flow to the horizontal production well 1 far from horizontal production well heel 6, leads to when steam reaches
When at hole pipeline section 3, the sieve pore that steam sequentially passes through on through-hole 17 and oil reservoir screen casing 4 on coiled tubing 2 enters oil reservoir to oil reservoir
Heating, the oil reservoir after being heated can be employed, and the oil reservoir that can be employed is extracted out by underground pumping unit, and enter ground
The steam of layer forms the vapor chamber 13 of continued development in the top of 1 horizontal segment of horizontal production well, and high pressure water injection rate will be with heating
The heating efficiency of cable 5 matches, and the water energy of injection is made gradually to heat up, and evaporation is realized before flowing out coiled tubing 2, conversion
For steam.
With the continuous extraction of crude oil, promote the formation and extension of vapor chamber 13.Since the quantity of steam that electric heating generates is
It is determined by rate of water injection, and the position that steam flows into stratum is then determined by the outlet port on coiled tubing 2, so as to
Steam-heated purpose is carried out to stratum by force in predetermined position to realize.Enter the steam on stratum from the sieve pore of oil reservoir screen casing 4
First to outflow point nearby ground layer for heating, make herein reservoir fluid be heated and produce, formed steam partial chamber 13；Due to underground
It is borehole pressure at oil extraction pump 11 compared with low spot, crude oil caused by electric heating and steam will be to horizontal production well heels 6
(" heel " position) flowing, finally forms biggish continuous steam chamber 14 in horizontal segment larger range, employs oil reservoir more
Uniformly, more 1 horizontal segment distal end oil reservoir of mining level producing well, to obtain higher oil recovery efficiency and yield, not only
It can reduce water content in crude oil, and the utilization efficiency of horizontal production well horizontal segment can be improved, improve gas oil ratio.
It is only compared by ground boiler steam injection mode with traditional, this method is by heating cable 5 plus thermogenetic steam category
In compulsory fixed point heating method, heat position and heat energy influenced by stratum heterogeneity it is smaller, thus in production well water
Flat section obtains more uniform heating effect；Electric heating compensates for what Boiler Steam was difficult to evenly distribute in producing well horizontal segment
Difficult point provides effective technical matters measure to improving the distributional pattern of vapor chamber 13, improving overall development benefit.
Using electric heating assisted gravity oil drainage mode, heat and steam can be directly sent to horizontal segment most desirablely
Side greatly improves the flexibility ratio of regulation efficiency and regulation.
This heat medium in addition to water, using non-condensing gas or can also can be heated the heating of cable 5 in gaseous
For heating the chemical addition agent of viscous crude in hydrocarbon or existing well-known technique.
From the above mentioned it is found that the utility model adds by using 5 pairs of cable fluids entered in coiled tubing 2 of heating
Heat, by fluid to stratigraphic oil pool transferring heat energy, since fluid (steam) enters stratum by the through-hole 17 on through-hole pipeline section 3,
Therefore, a position not instead of point for stratigraphic oil pool is heated, one section of region of horizontal segment enables vapor chamber 13 to develop into
Continuous steam chamber 14 employs oil reservoir more uniform, more 1 horizontal segment distal end oil reservoir of mining level producing well.
The utility model can also be heated with steam injection (by injecting steam pair into horizontal steam injection well or vertical steam injection well
The oil reservoir of 1 horizontal segment of horizontal production well is heated) combine, oil reservoir can be made to employ cycle time in this way, employ it is more uniform,
It is wider to employ range, further increases oil recovery efficiency and yield, reduces water content in crude oil, and can be further improved horizontal life
The utilization efficiency of 1 horizontal segment of well is produced, gas oil ratio is improved.
Above-mentioned electric heating assisted gravity oil drainage device can be made further optimization and/or improvements according to actual needs:
As shown in Fig. 2, the heating cable 5 in the coiled tubing 2 of horizontal production well horizontal segment is electrically connected with electricity and adds
Hot device 15.
It is combined by the way that cable 5 will be heated with electric heater 15, the heating efficiency to heat medium can be improved.
As shown in Fig. 2, electric heating assisted gravity oil drainage device further includes production casing 9, flow string 10 and is fixed on
The oil reservoir screen casing 4 of 1 horizontal segment of horizontal production well, production casing 9 are sequentially connected to oil reservoir screen casing 4, and coiled tubing 2 is arranged in
In annular space between the production casing 9 and flow string 10 of horizontal production well 1, and the right part of coiled tubing 2 protrudes into oil reservoir sieve
In pipe 4.
As shown in Fig. 2, heating cable 5 is arranged in from the coiled tubing between 1 well head of horizontal production well and through-hole pipeline section 3
In 2, heating cable 5 can be allowed to begin to heat from well head to heat medium in this way.
As needed, heating cable 5 is electrically connected with the power supply unit on well.
It heats cable 5 and uses single-phase or three phase supply.
As needed, the upper end import of coiled tubing 2 is fixedly connected with conveying equipment for fluid substances.Conveying equipment for fluid substances is not according to
Same heat medium can use different conveying equipment for fluid substances, for example, conveying equipment for fluid substances is using high when heat medium is water
Water pump 16.
The above technical characteristic constitutes the most preferred embodiment of the utility model, with stronger adaptability and best implementation
Effect can increase and decrease non-essential technical characteristic, according to actual needs to meet the needs of different situations.
Claims (10)
1. a kind of electric heating assisted gravity oil drainage device, it is characterised in that including coiled tubing, horizontal production well water can protruded into
The coiled tubing right part of flat section is provided with the through-hole pipeline section communicated with coiled tubing, is distributed on through-hole pipeline section tube wall and oil reservoir
The through-hole that the sieve pore of screen casing communicates is provided at least one heating cable in coiled tubing.
2. electric heating assisted gravity oil drainage device according to claim 1, it is characterised in that it is horizontal to be located at horizontal production well
Heating cable in the coiled tubing of section is electrically connected with electric heater.
3. electric heating assisted gravity oil drainage device according to claim 1 or 2, it is characterised in that further include production casing,
Flow string and the oil reservoir screen casing for being fixed on horizontal production well horizontal segment, production casing are sequentially connected to oil reservoir screen casing, continuous oil
Pipe is arranged in the annular space between the production casing of horizontal production well and flow string, and the right part of coiled tubing protrudes into
In oil reservoir screen casing.
4. electric heating assisted gravity oil drainage device according to claim 1 or 2, it is characterised in that heating cable setting is certainly
In coiled tubing between horizontal production well well head and through-hole pipeline section.
5. electric heating assisted gravity oil drainage device according to claim 3, it is characterised in that heating cable is arranged in Zi Shui
In coiled tubing between flat producing well well head and through-hole pipeline section.
6. electric heating assisted gravity oil drainage device described according to claim 1 or 2 or 5, it is characterised in that further include on well
Power supply unit, heating cable are electrically connected with the power supply unit on well.
7. electric heating assisted gravity oil drainage device according to claim 3, it is characterised in that further include that power supply on well is set
Standby, heating cable is electrically connected with the power supply unit on well.
8. electric heating assisted gravity oil drainage device according to claim 4, it is characterised in that further include that power supply on well is set
Standby, heating cable is electrically connected with the power supply unit on well.
9. electric heating assisted gravity oil drainage device described according to claim 1 or 2 or 5 or 7 or 8, it is characterised in that further include
The upper end import of conveying equipment for fluid substances, coiled tubing is fixedly connected with conveying equipment for fluid substances.
10. electric heating assisted gravity oil drainage device according to claim 6, it is characterised in that further include that fluid conveying is set
Standby, the upper end import of coiled tubing is fixedly connected with conveying equipment for fluid substances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821146620.6U CN208534469U (en) | 2018-07-19 | 2018-07-19 | Electric heating assisted gravity oil drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821146620.6U CN208534469U (en) | 2018-07-19 | 2018-07-19 | Electric heating assisted gravity oil drainage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208534469U true CN208534469U (en) | 2019-02-22 |
Family
ID=65385256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821146620.6U Expired - Fee Related CN208534469U (en) | 2018-07-19 | 2018-07-19 | Electric heating assisted gravity oil drainage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208534469U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344797A (en) * | 2019-07-10 | 2019-10-18 | 西南石油大学 | A kind of electric heater unit that underground high temperature is controllable and method |
| CN114482955A (en) * | 2022-02-17 | 2022-05-13 | 西南石油大学 | Method for improving deep thickened oil exploitation efficiency by underground crude oil cracking modification |
-
2018
- 2018-07-19 CN CN201821146620.6U patent/CN208534469U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344797A (en) * | 2019-07-10 | 2019-10-18 | 西南石油大学 | A kind of electric heater unit that underground high temperature is controllable and method |
| CN114482955A (en) * | 2022-02-17 | 2022-05-13 | 西南石油大学 | Method for improving deep thickened oil exploitation efficiency by underground crude oil cracking modification |
| CN114482955B (en) * | 2022-02-17 | 2023-04-25 | 西南石油大学 | Method for improving deep thickened oil extraction efficiency by utilizing downhole crude oil cracking modification |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190222 Termination date: 20190719 |